JP2002018613A - Cutter mounting instrument, cutter and cutting unit instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely hold the unlocking state P5 of a movable locking ball 5 by stabilizing the positioning of a lock operation cylinder 6 in relation to a support cylinder 4 and smoothly insert the shank 14 of a cutter into and pull out it from a support hole 27. SOLUTION: A cutting unit instrument comprises a cutter mounting instrument and a cutter. The cutter mounting instrument is provided with the support cylinder 4, the movable locking ball 5, the lock operation cylinder 6, a twist spring 7, the unlocking operation cylinder 8, a movable lock pin 9 and a compression spring 10. The cutter has the shank 14 which can be inserted into and pulled out from the support hole 27 of the support cylinder 4. The movable locking ball 5 can lock the lock operation cylinder 6 at a lock position and can unlock P5 the lock operation cylinder 6 at an unlocking position P6. The movable lock pin 9 can lock Q9 the lock operation cylinder 6 held at the unlocking position P6 and can unlock the locked turning of the lock operation cylinder 6 between the lock position and the unlocking position P6 for allowing the rotation of the lock operation cylinder 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter such as a punch cutter, and more particularly to a cutter fixture for supporting a shank of a punch cutter, and a cutting unit combining the cutter and the cutter fixture.

[0002]

2. Description of the Related Art Conventionally, in an annular cutter disclosed in Japanese Patent No. 2555854, as shown in the drawing of the same publication,
An arbor 1 having a hole 1a into which the insertion portion 9 of the cutter 6 is removably fitted, and is rotated with respect to the arbor 1 between a lock position (see FIGS. 5 and 7) and an unlock position (see FIGS. 1 and 3). The locking member 7 is supported by the arbor 1 on the inner peripheral surface of the hole 1a of the arbor 1 facing the insertion / removal locus surface of the outer peripheral surface of the insertion portion 9 of the cutter 6. The locking member 7 has a locked state (see FIGS. 5 and 7) in which the outer peripheral surface enters the insertion / removal locus surface at the lock position of the sleeve 4 and an insertion / removal locus surface of the outer peripheral surface at the lock release position of the sleeve 4. (See FIGS. 1 and 3) which can escape to the outside, and is held by the support member 2 in this unlocked state.

[0003]

The above-mentioned conventional annular cutter has the following disadvantages *. * In the unlocked state shown in FIGS. 1 and 3, the arbor 1 and the sleeve 4 are indirectly locked by the support member 2 via the locking member 7, and the unlocked state is maintained. The locking member 7 can move slightly in the accommodation hole 7a. for that reason,
The sleeve 4 can also move slightly with respect to the arbor 1 via the locking member 7. Therefore, the sleeve 4 with respect to the arbor 1
Positioning becomes unstable.

* In the unlocked state shown in FIGS. 1 and 3, FIG.
The insertion portion 9 of the cutter 6 shown in FIG.
Immediately after the support member 2 is pushed by the insertion portion 9 and detaches from the locking member 7, the locking member 7 is guided by the passing portion 9 a of the insertion portion 9 and engages with the engagement portion 9 b of the insertion portion 9. Into the locked state shown in FIGS. Bearing member 2
If the passage portion 9a of the insertion portion 9 does not coincide with the locking member 7 in the circumferential direction just before the insertion portion 9 is pushed by the insertion portion 9, the locking member 7 is locked and inserted before the insertion portion 9 is inserted. There is a possibility that the abutment may come into contact with the end face of the portion 9 and the insertion portion 9 may not be inserted smoothly. Figure 6
This is more prominent in the case of the insertion portion 9 of the cutter 6 shown in FIG. Therefore, the holding means in the unlocked state by the support member 2 cannot guarantee a smooth insertion / removal function unless a considerably strict design is performed.

* The support member 2 is provided in the hole 1a of the arbor 1. Therefore, the internal structure of the arbor 1 becomes complicated. * The maximum outer diameter of the end of the insertion portion 9 of the cutter 6 is substantially equal to the maximum inner diameter of the opening of the hole 1a of the arbor 1. The reason for making the outer diameter and the inner diameter equal to each other with an optimum fitting tolerance is to stably support the insertion portion 9 with respect to the hole 1a. On the other hand, in the unlocked state,
Can be completely immersed into the accommodation hole 7a from the inside of the hole 1a,
Whether the part 7b is slightly protruded into the hole 1a greatly affects the setting of the outer diameter and shape of the insertion part 9 having the engagement part 9b, and an optimum design according to the conditions is made. You need to do it. In other words, the outer peripheral surface of the insertion portion 9 fitted into the inner peripheral surface of the hole 1a for stable support and the outer peripheral surface of the insertion portion 9 having the engaging portion 9b have completely different ideas. And the design must be done. Therefore, FIG.
Consider the insertion section 9 of the cutter 6 shown in FIG.

[0006] The insertion portion 9 is distinguished between a large diameter portion and a small diameter portion through a step portion. With such a small diameter portion, it is certain that the insertion portion 9 of the cutter 6 can be easily inserted into the hole 1a of the arbor 1. However, the engaging portion 9b is formed over the large-diameter portion and the small-diameter portion at a step portion at the boundary between the large-diameter portion and the small-diameter portion. Therefore, it is substantially equivalent to that the engaging portion 9b is formed on the outer peripheral surface of the large diameter portion. The outer peripheral surface of the large-diameter portion is also the outer peripheral surface of the insertion portion 9 fitted into the inner peripheral surface of the hole 1a for stable support. Therefore, when the above-described ease of insertion by the small diameter portion and the stable support of the insertion portion 9 are also taken into consideration, the locking member 7 is accommodated from the hole 1a in the unlocked state in order to smoothly insert the insertion portion 9. The locking member 7 must be completely immersed in the hole 7a, and the state of the locking member 7 in the unlocked state is restricted. Is naturally restricted.

[0007] In view of the above problems, the present invention has been improved for the following *. * The positioning of the lock operation body (corresponding to the sleeve 4) with respect to the support cylinder (corresponding to the arbor 1) is stabilized, and the locked state and the unlocked state of the movable lock portion (corresponding to the locking member 7) are securely maintained. I do.

[0008] * The insertion portion of the cutter (corresponding to the insertion portion 9 of the cutter 6) is connected to the support hole of the support cylinder (corresponding to the hole 1a).
Insert and remove smoothly. * Each component is compacted and the structure inside the support cylinder is simplified.

[0009] The insertion portion of the cutter is easily inserted into the support hole of the support cylinder and is stably supported. Moreover,
The state of the movable lock portion in the unlocked state and the insertion portion of the cutter can be set in a wide range of patterns.

[0010]

Means for Solving the Problems and Effects of the Invention The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 8) of the embodiments described later. * The cutter attachment (2) according to the first aspect of the invention The cutter attachment (2) according to the present invention includes a support hole (27) into which the insertion portion (14) of the cutter (3) is removably inserted. Support cylinder (4) having the same, and this support cylinder (4)
And a lock operating body (6) movably supported between a lock position (Q ₆ ) and an unlock position (P ₆ ), and the insertion of an outer peripheral surface (17) of an insertion portion (14) of a cutter (3). Support hole (27) of support cylinder (4) facing derailing surface (18, 61)
And a movable lock portion (5) supported by the support cylinder (4) on the inner peripheral surface (30) of the movable cylinder. This movable lock part (5)
A lock state (Q ₅ ) in which the lock operation body (6) enters the inside of the insertion / removal trajectory surface (18, 61) of the outer peripheral surface (17) at the lock position (Q ₆ ), and a lock of the lock operation body (6). At the release position (P ₆ ), the insertion / removal trajectory surface (1) of the outer peripheral surface (17)
Can escape to the outside of the 8,61) can take an unlocked state (P _5).

A movable locking portion (9) locked between the support cylinder (4) and the lock operation body (6).
Is provided. The movable locking portion (9) prevents the relative movement between the support cylinder (4) and the lock operation body (6) at the lock release position (P ₆ ) of the lock operation body (6) to prevent the lock operation body (6). ) At the unlock position (P ₆ ), the lock position (Q ₉ ), the lock position (Q ₆ ) and the unlock position (P ₆ ).
₆ ) and an unlocked position (P ₉ ) allowing movement of the lock operation body (6).

[0012] In the present invention, since there is provided a movable locking part (9) holding in the unlocked position locking body (6) (P _6), the unlocking state (P ₅₎ of the movable locking portion (5)
Can be maintained. Also, the movable locking portion (9)
Is provided between the support cylinder (4) and the lock operation body (6), so that the movable locking portion (9) is movable relative to the support cylinder (4) and the lock operation body (6). It is locked directly without going through. Therefore, it is possible to stably position the lock operation body (6) with respect to the support cylinder (4), and to more reliably maintain the unlocked state (P ₅ ) of the movable lock portion (5).

Furthermore, the insertion portion (14) of the cutter (3) is inserted into the support hole (27) of the support cylinder (4) while maintaining the unlocked state (P ₅ ) by the movable locking portion (9). Then, when the movable locking portion (9) is set to the unlocking position (P ₉ ) and the lock operation body (6) is set to the locking position (Q ₆ ), the movable locking portion (5) is locked (Q ₅ ).
Conversely, in the locked state (Q ₅ ), the lock operating body (6) is set to the unlock position (P ₆ ), and the movable locking portion (9) is set to the locking position (Q ₉ ). Into the unlocked state (P ₅ ), and while the unlocked state (P ₅ ) is maintained by the movable locking portion (9), the insertion portion (14) of the cutter (3) is inserted into the support cylinder (4). Remove from the support hole (27). Therefore, the insertion portion (14) of the cutter (3) can be smoothly inserted and removed.

In the present invention, the movable locking portion (9) according to the first aspect of the present invention is moved from the locking position (Q ₉ ) to the unlocking position ( P ₉ )
And an unlocking operation body (8) for moving the lock. Therefore, in addition to the effects of the first aspect of the present invention, the movable unlocking portion (9) is moved to the unlocking position (P
₉ ) Can be easily returned to.

[0015] The cutter attachment (2) according to the third aspect of the present invention provides the cutter attachment (2) according to the present invention, in which the support hole (14) into which the insertion portion (14) of the cutter (3) is removably inserted. 27) and a support cylinder (4) having the same.
And a lock operating body (6) movably supported between a lock position (Q ₆ ) and an unlock position (P ₆ ), and the insertion of an outer peripheral surface (17) of an insertion portion (14) of a cutter (3). Support hole (27) of support cylinder (4) facing derailing surface (18, 61)
And a movable lock portion (5) supported by the support cylinder (4) on the inner peripheral surface (30) of the movable cylinder. This movable lock part (5)
A lock state (Q ₅ ) in which the lock operation body (6) enters the inside of the insertion / removal trajectory surface (18, 61) of the outer peripheral surface (17) at the lock position (Q ₆ ), and a lock of the lock operation body (6). At the release position (P ₆ ), the insertion / removal trajectory surface (1) of the outer peripheral surface (17)
Can escape to the outside of the 8,61) can take an unlocked state (P _5).

The lock operating body (6) has an insertion portion (14) of a cutter (3) with respect to the outer periphery of the support cylinder (4).
The support cylinder (4) has a cylindrical shape that is rotatably supported about a rotation center line (31) of the support cylinder (4) along the insertion / removal direction. A support cylinder (4) into which the insertion portion (14) of the cutter (3) is inserted / removed.
The movable locking portion (9) was supported at the opening-side end of the lock operating body (6) adjacent to the opening-side end (26) of the above. The open end (26) of the support cylinder (4) is provided with a locked part (51) to which the movable locking part (9) is disengaged. An unlocking operation body (8) capable of unlocking the movable locking portion (9) with respect to the locked portion (51) is provided facing the opening side end (26) of the support cylinder (4). Was.

In the present invention, since the movable locking portion (9) is provided between the support cylinder (4) and the lock operation body (6), the movable locking portion (9) is locked with the support cylinder (4). It is directly locked to the operation body (6) without passing through the movable lock portion (5),
It is possible to maintain the unlocked state of the to stabilize example movable locking portion positioning of the locking member relative to the support tube (4) (6) (5 ) (P 5) more reliably. Further, the movable locking portion (9) is operated by the unlocking operation body (8).
Can be easily returned to the unlocking position (P ₉ ). Furthermore, the support cylinder (4), the lock operation body (6), the movable lock portion (5), the movable lock portion (9), and the lock release operation body (8).
And the movable locking portion (9) is provided in the lock operation body (6) without being provided in the support tube (4), so that the structure in the support tube (4) can be simplified. can do.

* The cutter attachment (2) according to the invention of claim 4 In this invention, the movable locking portion (9) according to the invention of claim 3 is provided at the lock release position (P ₆ ) of the lock operation body (6). ), The support tube (4) locked by the locked portion (51).
A locking position (Q ₉ ) for holding the lock operation body (6) at the lock release position (P ₆ ) by preventing relative rotation between the lock operation body (6) and the locked portion (51). The lock operation body (6) can be separated from the lock position (Q ₆ ) and the lock release position (P ₆ ) to take the lock release position (P ₉ ) that allows the rotation of the lock operation body (6).

According to the present invention, in addition to the effect of the third aspect of the present invention, since the movable locking portion (9) for holding the lock operating body (6) at the unlocked position (P ₆ ) is provided, the movable locking portion (9) is provided. Not only can the lock release state (P ₅ ) of ₅ ) be maintained, but also the support cylinder (4) and the lock operating body (6).
The movable locking portion (9), which is directly locked without the movable locking portion (5), stably positions the lock operating body (6) with respect to the support cylinder (4), thereby enabling the movable locking portion. The unlocked state (P ₅ ) of ( ₅ ) can be maintained more reliably.

Further, while the unlocked state (P ₅ ) is maintained by the movable locking portion (9), the insertion portion (14) of the cutter (3) is inserted into the support hole (27) of the support cylinder (4). Then, when the movable locking portion (9) is set to the unlocking position (P ₉ ) and the lock operation body (6) is set to the locking position (Q ₆ ), the movable locking portion (5) is locked (Q ₅ ).
Conversely, in the locked state (Q ₅ ), the lock operating body (6) is set to the unlock position (P ₆ ), and the movable locking portion (9) is set to the locking position (Q ₉ ). Into the unlocked state (P ₅ ), and while the unlocked state (P ₅ ) is maintained by the movable locking portion (9), the insertion portion (14) of the cutter (3) is inserted into the support cylinder (4). Remove from the support hole (27). Therefore, the insertion portion (14) of the cutter (3) can be smoothly inserted and removed.

* Cutter mounting fixture (2) according to the invention of claim 5 In this invention, the movable locking portion (9) according to the invention of claim 1, 2, or 4 is provided with a first elastic body ( It can be moved to the locking position (Q ₉ ) by the elastic force of 10). Therefore, in addition to the effect of the first, second, or fourth aspect of the invention, the movable locking portion (9) can be easily moved to the locking position (Q ₉ ) by utilizing elastic force. it can.

* The cutter attachment (2) according to the invention of claim 6 In this invention, the lock operating body (6) according to any one of claims 1 to 5 is provided with a second elastic member. It can be moved to the lock position (Q ₆ ) by the elastic force of the body (7). Therefore, in addition to the effects of any one of the first to fifth aspects of the present invention, the movement of the lock operation body (6) to the lock position (Q ₆ ) can be easily performed by using the elastic force. Can be.

* The cutter (3) according to the seventh aspect of the present invention is a cutter (3) according to the present invention, wherein the insertion portion (14) is removably inserted into the support hole (27) of the cutter attachment (2). ). The outer peripheral surface (17) of the insertion portion (14) is formed on the inner peripheral surface (30) of the support hole (27).
In addition to the intermediate outer peripheral surface (20) fitted to the inner peripheral surface, an end outer peripheral surface (18) separated from the intermediate outer peripheral surface (20) via a step portion (19) is provided. The outer diameter of the end portion outer peripheral surface ₍₁₈₎ (D 18) was set to be smaller than the outer diameter of the intermediate outer peripheral surface ₍₂₀₎ (D 20). Therefore, the insertion portion (14) of the cutter (3) can be easily inserted into the support hole (27) of the cutter fixture (2).

Further, the inner peripheral surface (3) of the support hole (27)
The lock in which the movable lock portion (5) supported in (0) is disengaged.
The recess (21) is provided only on the outer peripheral surface (18) on the end side.
Was. Therefore, the unlocked state (P_Five) With movable lock
(5) Complete from the support hole (27) to the lock recess (21).
Make the movable lock part (5) fully immersible and support hole
(27) Do not leave it slightly protruding inside
The unlocked state (P _Five) Of the movable lock part (5)
The state and the insertion part (14) of the cutter (3)
Can be set on turns.

* The cutting unit tool (1) according to the invention of claim 8 is a cutting unit tool (1) according to the present invention.
In addition to the cutter (3) having 4), a cutter attachment (2) having a support cylinder (4), a lock operating body (6), and a movable lock portion (5) is provided. This support cylinder (4)
Has a support hole (27) into which the insertion portion (14) of the cutter (3) is removably inserted. The lock operating body (6) is movably supported by the support cylinder (4) between a lock position (Q ₆ ) and an unlock position (P ₆ ). The movable lock portion (5) is provided with a support hole (27) of the support cylinder (4) facing the insertion / removal trajectory surface (18, 61) of the outer peripheral surface (17) of the insertion portion (14) of the cutter (3).
The inner peripheral surface (30) is supported by the support cylinder (4), and the outer peripheral surface (17) at the lock position (Q ₆ ) of the lock operating body (6).
In the locked state (Q ₅ ) entering the inside of the insertion / removal trajectory surface (18, 61) of the outer peripheral surface (17) in the unlocked position (P ₆ ) of the lock operation body (6). , 6
The lock release state (P ₅ ) that can escape to the outside of 1) can be taken.

The outer peripheral surface (17) of the insertion portion (14) of the cutter (3) is an outer peripheral surface (18) on the end side which is inserted first into the support hole (27) of the support cylinder (4). And an intermediate outer peripheral surface (20) which is continuous with the end side outer peripheral surface (18) via a step portion (19). The outer diameter (D ₁₈ ) of the outer peripheral surface (18) on the end side is set to the intermediate outer peripheral surface (2
0) was set smaller than the outer diameter (D ₂₀ ). Further, even on the inner peripheral surface (30) of the support hole (27) of the support cylinder (4), the bottom inner peripheral surface where the end outer peripheral surface (18) of the insertion portion (14) faces. (32) and an opening-side inner peripheral surface (34) into which the intermediate outer peripheral surface (20) of the insertion portion (14) is fitted, through a step (33). The inside diameter (D ₃₂₎ of the bottom side inner circumferential surface (32) and smaller than the inner diameter (D ₃₄₎ of the opening-side inner peripheral surface (34). The movable lock portion (5) was supported by the support cylinder (4) on the bottom inner peripheral surface (32). Therefore, the inner peripheral surface (34) of the support hole (27) of the support cylinder (4) on the opening side and the insertion portion (1) of the cutter (3) are inserted.
Between the 4) end side outer peripheral surface (18) a gap by the difference between their inside diameter (D ₃₄₎ to the outer diameter (D _18). Therefore, the insertion portion (14) of the cutter (3) can be easily inserted into the support hole (27) of the support cylinder (4).

In the case where the unlocking operation body (8) is provided facing the opening side end (26) of the support cylinder (4) as in the invention of claim 3 or 4, the cutter ( The insertion part (14) of 3) becomes inadvertently difficult to abut against the unlocking operation body (8), and the insertion part (14) of the cutter (3) is inserted into the support hole (27) of the support cylinder (4). Can be inserted more easily.

* The cutting unit tool (1) according to the ninth aspect of the present invention is the cutting unit tool according to the eighth aspect, wherein the outer diameter (D ₁₈ ) of the outer peripheral surface (18) on the end portion is equal to the inner peripheral surface on the bottom ( ₁₈ ). 32) is substantially equal to the inside diameter (D ₃₂₎ less than or the inner diameter (D ₃₂₎ of the inner diameter of the outer diameter of the intermediate outer peripheral surface (20) (D ₂₀₎ is open side inner peripheral surface (34) (D ₃₄ ) It is set almost equal to. Therefore, in addition to the effect of the invention of claim 8, the insertion portion (14) of the cutter (3) is connected to the support cylinder (4) by fitting the intermediate outer peripheral surface (20) and the opening-side inner peripheral surface (34). Can be stably supported by the support hole (27).

The inner peripheral surface (3) on the bottom side of the support hole (27)
Supported movable locking portion at 2) (5) when is provided only on the end side outer peripheral surface a locking recess (21) which is disengaged (18) is movable locking portion in the unlocked state (P ₅₎ (5)
Can be completely immersed into the lock recess (21) from within the support hole (27), or the movable lock portion (5) can be connected to the support hole (2).
7) Keeping it slightly protruding inside
Movable locking portion in the unlocked state (P ₅₎ state and the (5) can be set inserting portion of the cutter (3) (14) in a wide range of patterns.

* The cutting unit tool (1) according to the tenth aspect of the present invention, the cutter mounting tool (2) according to the eighth or ninth aspect of the present invention comprises a support cylinder (4) and a lock operating body (1). 6) and a movable locking portion (9) that can prevent relative movement between the support cylinder (4) and the lock operation body (6). The movable locking portion (9) is directly locked to the support cylinder (4) and the lock operation body (6) without passing through the movable lock portion (5), and the lock operation body to the support cylinder (4) is provided. By stabilizing the positioning of (6), for example, the unlocked state (P ₅ ) of the movable lock portion (5) can be more reliably maintained.

* Cutting unit tool (1) according to the invention of claim 11 In this invention, the cutter mounting tool (2) according to the invention of claim 8 or 9 is any one of claim 1 to claim 6 A cutter attachment (2) according to the invention of the above claim.

* Cutting unit tool (1) according to the invention of claim 12 In this invention, the cutter (3) according to the invention of any one of claims 8 to 11 is the invention of claim 7 (3).

* Invention other than Claims-The cutter attachment (2) according to the thirteenth invention This invention is configured as follows based on the invention of claim 3 or claim 4.

The unlocking operation body (8) is supported movably in the direction of the rotation center line (31) of the support cylinder (4) with respect to the opening end of the lock operation body (6). ) Has an unlocking surface (60) that can abut against the movable locking portion (9) locked to the locked portion (51) at the opening end (26). Therefore, the unlocking operation body (8) can be made compact.

A cutter attachment (2) according to a fourteenth aspect of the present invention is based on the premise of the invention according to any one of the first to sixth aspects or the thirteenth aspect, as follows. It is configured.

The lock operating body (6) has a lock surface (39) for bringing the movable lock portion (5) into the locked state (Q ₅ ) at the lock position (Q ₆ ) and a movable lock at the lock release position (P ₆ ). and a lock release acceptable surface (40) of the section (5) the unlocked state (P _5).

[0037]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a cutter mounting device and a cutter according to an embodiment of the present invention;

<Outline of Component Configuration of Cutting Unit Tool 1 shown in FIG. 1> The cutting unit tool 1 includes a cutter fixture 2 and a cutter 3. The cutter attachment 2 is roughly divided into a support tube 4, a movable lock ball 5 as a movable lock portion, a lock operation tube 6 as a lock operation body, a torsion spring 7 as an elastic body, and a lock release. It includes a lock release operation cylinder 8 as an operating body, a movable locking pin 9 as a movable locking portion, and a compression coil spring 10 as an elastic body. The cutter 3 is an annular cutter, and includes a perforated blade cylinder 11 having a cutting edge (not shown).
And a centering shaft 12 to be inserted into the shaft.

<Cutter 3 shown in FIGS. 1 and 2, 5, 6, and 6> The piercing blade cylinder 11 of the cutter 3 includes a piercing blade 13 having a cutting edge (not shown) and a shank 14 as an insertion portion.
Consists of The center hole 1 extends from the upper end of the shank 14 to the lower end of the boring blade 13 on the rotation center line 15 of the cutter 3.
6 are provided. Outer peripheral surface 17 of this shank 14
Has a circular shape centered on the rotation center line 15, and has an end outer peripheral surface 18 (insertion / removal trajectory surface) and an intermediate outer peripheral surface 20 continuous with the end outer peripheral surface 18 via a step 19. It is divided into and. The shank 14 continues to the boring blade 13 at the intermediate outer peripheral surface 20. Outer diameter D ₁₈ of the outer peripheral surface 18 on the end side
It is set to be slightly smaller than the outer diameter D ₂₀ of the intermediate outer peripheral surface 20. A plurality (five) are provided on the outer peripheral surface 18 on the end side.
Are formed at regular intervals in the circumferential direction. The insertion portion of the cutter 3 means not only the shank 14 itself but also a sleeve and a socket (not shown) into which the shank 14 is inserted, in addition to the shank 14 itself.

The centering shaft 12 of the cutter 3 has a head 22
And a shaft 23. This shaft portion 23 is used for the perforated blade cylinder 1.
1 is inserted into the center hole 16 from the shank 14 side, and the head 22 is superimposed on the upper end surface of the shank 14.
The lower end of the shaft 23 projects slightly from the lower end of the drilling blade 13.

<The Support Tube 4 and the Movable Lock Ball 5 shown in FIG. 1, and FIGS. 2, 5, and 6>
4 and a mounting tube 25 which is detachably supported on a machine tool or the like (not shown). In this mouthpiece 24, a flange plate 26 is detachably screwed at an open end at the lower end. A support hole 27 is formed in the barrel 24. The support hole 27 is opened at an opening 28 in the flange plate 26, and the opening 2
8 has a bottom surface 29 facing the same. The inner peripheral surface 30 of the support hole 27 has a circular shape centered on the rotation center line 31, and has a bottom inner peripheral surface 32 and an opening continuous with the bottom inner peripheral surface 32 through a step 33. And a side inner peripheral surface 34. The internal diameter D ₃₂ of the bottom side in the peripheral surface 32 is slightly smaller than the inner diameter D ₃₄ of the opening-side inner peripheral surface 34, the inner diameter D ₃₂ of the bottom side inner peripheral surface 32 end portion of the shank 14 The outer diameter D 18 of the outer peripheral surface 18 is set to be slightly larger than the outer diameter D _{18, and} the inner diameter D _{34 of the} opening-side inner peripheral surface 34 is optimally fitted to the outer diameter D ₂₀ of the intermediate outer peripheral surface 20 of the shank 14. They are set almost equal within the tolerance range. A plurality of (five) lock holes 35 are formed in the barrel 24 on the bottom inner peripheral surface 32.
Are arranged at equal intervals in the circumferential direction and penetrate inward and outward.
The mounting hole 36 formed in the mounting cylinder 25 along the rotation center line 31 penetrates the support hole 27 on the bottom surface 29.

The movable lock ball 5 is a plurality (five) of steel balls, is fitted into each lock hole 35 of the barrel 24, and can move in a radial direction orthogonal to the rotation center line 31. , Are locked by the step portions 37 formed in the lock holes 35 and do not fall off to the support holes 27 side.

<Locking operation tube 6 and torsion spring 7 shown in FIGS. 1 and 2, 5, and 6> The locking operation tube 6 is inserted around the outer periphery of the mouthpiece 24 of the support tube 4 and supported. The cylinder 4 can rotate around the rotation center line 31. A plurality of (5) are provided on the concave / convex portion 38 formed on the inner peripheral surface of
) Of convex lock surfaces 39 and a plurality of (five) concave lock release surfaces 40 are alternately arranged at equal intervals in the circumferential direction. Radius R ₃₉ with respect to the rotational center line 31 of the support tube 4 in this locking surface 39 is smaller than the radius R ₄₀ with respect to the rotational center line 31 of the support tube 4 in this unlocking surface 40. The lock surface 39 and the lock release surface 40 can be radially adjacent to each lock hole 35 of the barrel 24 with the rotation of the lock operation barrel 6. Each movable lock ball 5 is located between each lock hole 35 and each lock surface 39 or each lock release surface 40.

The torsion spring 7 is wound around the outer periphery of the barrel 24 of the support barrel 4 inside the upper end of the lock operation barrel 6, and one end 41 of the torsion spring 7 is connected to the barrel 24. And the other end 43 of the torsion spring 7 is hooked to the lock operation cylinder 6 by a hook hole 44.

As shown in FIG. 2 and FIG. 6 (a), when the allowed to the unlocked position P ₆ are rotated against the elastic force of the spring 7 twist lock operation tube 6 to a mouth tube 24 also movable locking ball 5 in the lock hole 35, the unlocked state P ₅ next may escape from the bottom side in the peripheral surface 32 of the mouth tube 24 in correspondence with the unlock face 40 in the lock hole 35. However, even when the movable lock balls 5 are in contact with the lock release surfaces 40, the movable lock balls 5 protrude from the bottom inner peripheral surface 32 of the barrel 24 into the support holes 27 by a very small non-lockable dimension. The lock inhibiting size is set to less than half the size of the difference between the outer diameter D ₁₈ of the end side outer circumferential surface 18 of the inner diameter D ₃₂ of the bottom side in the peripheral surface 32 of the support hole 27 shank 14 .

As shown in FIGS. 5 and 6B,
When the lock operating tube 6 is in the locked position Q ₆ rotates by an elastic force of the spring 7 torsion relative to the mouth tube 24, also movable locking ball 5 of the lock hole 35, lock state Q _5, and the
Pressed by each lock surface 39, the bottom inner peripheral surface 3 of the barrel 24
2 protrudes into the support hole 27 by a lockable dimension. The lockable dimension is determined by the bottom inner peripheral surface 32 of the support hole 27.
Of is set to more than half of the size of the difference between the inner diameter D ₃₂ and the outer diameter D ₁₈ of the end side outer circumferential surface 18 of the shank 14.

<Lock Release Operation Tube 8, Movable Lock Pin 9, and Compression Coil Spring 10> As shown in FIGS. 1, 2 and 5, the lock release operation tube 8 has a peripheral wall portion 45 and a bottom wall portion 46.
Consists of The bottom wall portion 46 is provided with the flange plate 26 of the barrel 24.
It has an opening 47 facing the opening 28 inside. A plurality (three) guide shafts 48 are screwed to the peripheral wall 45 at equal intervals in the circumferential direction. A plurality of (three) guide grooves 49 are formed on the outer peripheral surface of the opening side end of the lock operation cylinder 6 at equal intervals in the circumferential direction. This bottom wall 4
The peripheral wall 45 is inserted into the outer periphery of the opening end of the lock operation cylinder 6 so as to be adjacent to the flange plate 26 which is the opening end of the mouthpiece 24. Has been engaged in. The lock release operation cylinder 8 can move in the direction of the rotation center line 31 of the support cylinder 4 within the range of each guide groove 49 while being guided by each guide shaft 48 and each guide groove 49.

As shown in FIG. 1 and FIGS.
The locking pin 9 and the compression coil spring 10 perform the locking operation.
It is inserted into a fine hole 50 formed at the opening end of the cylinder 6.
You. A locking hole 5 as a locked portion is formed in a flange plate 26 of the barrel 24.
1 is penetrated, and the
The contact surface 52 extends in the direction of a constant circumferential angle range.
You. As shown in FIG. 2 and FIG.
Tube 6 is in unlocked position P ₆In this state
The pin 9 is rotated by the elastic force of the compression coil spring 10.
It is pushed in the direction of the center line 31, and as shown in FIG.
Is unlocked from the collar plate 26 by being
A locking position Q protruding toward the bottom wall 46 of the operation cylinder 8₉Take
You. As shown in FIG. 5 and FIG.
Tube 6 is in lock position Q₆The movable locking pin
9 is the rotation center line 3 due to the elastic force of the compression coil spring 10.
1 as shown in FIG. 7 (b).
Unlocking position where the abutment surface 52 makes contact with the flange plate 26 of No. 4
P₉I take the.

[0049] As shown in FIG.
Is composed of a large-diameter portion 53 and a small-diameter portion 55 continuous with the large-diameter portion 53 via a step 54. Further, in the small diameter portion 55, a columnar locking outer peripheral surface 56 parallel to the direction of the rotation center line 31 is formed adjacent to the step portion 54, and a hemispherical inclined outer peripheral surface 57 is formed. It is formed adjacent to the stop outer peripheral surface 56. In addition, the collar plate 2
6, on the bottom wall portion 46 side of the unlocking operation tube 8, a cylindrical locking inner peripheral surface 58 parallel to the direction of rotation of the movable locking pin 9, which is the direction of the rotation center line 31. A conical inclined inner peripheral surface 59 formed by counterbore is formed on the opening end side of the lock operation cylinder 6.

When the movable locking pin 9 is at the locking position Q ₉ as shown in FIGS. 2, 4 (a) and 7 (a), the large-diameter portion 53 has a step relative to the inclined inner peripheral surface 59. This inclined inner peripheral surface 59 receives the elastic force of the compression coil spring 10 by contacting with the portion 54, and the locking outer peripheral surface 56 of the small diameter portion 55 is locked to the locking inner peripheral surface 58 of the locking hole 51, and The inclined outer peripheral surface 57 of the portion 55 projects from the locking inner peripheral surface 58 of the locking hole 51.

An unlocking surface 60 is formed on the bottom wall 46 of the unlocking operation cylinder 8 in the direction in which the movable locking pin 9 is engaged and disengaged. 2, movable locking pin 9 as shown in FIG. 4 (a) and FIGS. 7 (a) is a state in a locked position Q _9,
As shown in FIGS. 3 and 4B, the unlocking operation cylinder 8 is moved toward the flange plate 26 of the mouthpiece 24, and the inclined outer peripheral surface of the movable locking pin 9 is formed on the unlocking surface 60 of the bottom wall portion 46. When the movable lock pin 57 is brought into contact with the movable lock pin 9, the movable lock pin 9 is pushed upward against the elastic force of the compression coil spring 10. While entering the inside of the peripheral surface 58, the locking outer peripheral surface 56 of the movable locking pin 9 escapes from the inside of the locking inner peripheral surface 58 of the locking hole 51 and enters the inside of the inclined inner peripheral surface 59. In the locking hole 51, a movable locking pin 9 is formed at the boundary between the locking inner peripheral surface 58 and the inclined inner peripheral surface 59.
4 (c) and 4 (d), a rotating power is generated by the elastic force of the torsion spring 7 acting on the lock operation cylinder 6 to tilt the movable locking pin 9 as shown in FIGS. Outer peripheral surface 57
While being pressed against the inclined inner peripheral surface 59 of the locking hole 51, comes off from the inside of the inclined inner peripheral surface 59. Then, while the inclined outer peripheral surface 57 of the movable locking pin 9 is pressed against the abutment surface 52 of the flange plate 26, movable locking pin 9 is returned to the locking release position P ₉ shown in FIGS. 5 and 7 (b) .

[0052] <the detachable operation of the cutter 3 with respect to the cutter fixture 2> * 2 and 6 (a), the state locking tube 6 shown in FIG. 7 (a), the unlocking position P ₆ relative to the support tube 4
It is in. The shank 14 is inserted into the support hole 27 of the support cylinder 4, abuts on the bottom surface 29 at the head 22 of the centering shaft 12, and faces the bottom inner peripheral surface 32 at the end outer peripheral surface 18. The outer peripheral surface 20 is fitted to the inner peripheral surface 34 on the opening side. Each movable lock ball 5 is provided with each lock recess 21 of the shank 14 of the cutter 3 and each lock release surface 4 of the lock operation cylinder 6.
0 located between the take unlocked state P _5, which may escape to the outside of the insertion and removal path surface of the shank 14 (the end side outer circumferential surface 18). The movable locking pin 9 is engaged with the locking hole 51 of the flange plate 26 by the elastic force of the compression coil spring 10, and prevents the relative rotation between the support cylinder 4 and the lock operation cylinder 6 to prevent the lock operation cylinder 6 from rotating. in the locked position Q ₉ which holds the locking position Q _6. The lock release operation cylinder 8 is at a standby position away from the flange plate 26 of the support cylinder 4.

* State shown in FIGS. 3 and 4 In the state shown in FIGS. 2, 6 (a), and 7 (a), the lock release operation cylinder 8 is brought closer to the flange plate 26 of the support cylinder 4 from the standby position. When the movable locking pin 9 is pushed up against the elastic force of the compression coil spring 10, the movable locking pin 9 comes out of the locking hole 51 of the flange plate 26, and FIGS. 5 and 6B and FIG. ).

[0054] * 5 and 6 (b), in the locked position Q ₆ rotates by an elastic force of the spring 7 torsion locking tube 6 In this state shown in FIG. 7 (b). Each movable lock ball 5
The lock recesses 21 of the shank 14 and the lock operation cylinder 6
Of it located between each locking surface 39, taking the locked state Q ₅ which pushed enters into the locking recess 21 in the locking surface 39. Movable locking pin 9 will unlocked position P ₉ which allows the rotation of the locking tube 6 between the lock position Q ₆ and an unlocked position P _6.

* The cutter 3 can be detached from the cutter fixture 2 in the state of the cutter fixture 2 shown in FIG. 2, FIG. 6 (a), and FIG. 7 (a). In this state, the cutter 3 can be inserted into the cutter fixture 2.

<Another Example> * Another example of the above-described embodiment shown in FIG.
8, a plurality (five) of flat portions 61 (insertion / removal locus surfaces) are provided at equal intervals in the circumferential direction, and the lock recesses 21 are provided in each of the flat portions 61. The radius of the flat portion 61 with respect to the rotation center line 15 is smaller than the radius of the end-side outer peripheral surface 18. Each movable lock ball 5 is in a state of protruding from the bottom inner peripheral surface 32 of the barrel 24 into the support hole 27 by an unlockable dimension even in a state of contacting each lock release surface 40. The non-lockable dimension can be set to be larger than that of the embodiment by forming the flat portion 61.

In the above embodiment, the lock hole 35 of the movable lock ball 5 and the support cylinder 4 and the lock surface 3 of the lock operation cylinder 6
9 and the lock recess 2 of the unlock surface 40 and the shank 14
In each case, only five are provided. The number may be one or more, and is appropriately changed.

* The cutter 3 is changed to a perforated cutter other than the annular cutter, such as a drill or a reamer.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a cutter mounting tool and a cutter in a cutting unit tool according to the present embodiment.

FIG. 2 is a cross-sectional view showing a setting intermediate state in which a cutter is inserted into a cutter mounting tool in an unlocked state in a state where the cutter mounting tool and the cutter are assembled.

FIG. 3 is a cross-sectional view showing a state in which the movable locking pin is unlocked in the setting halfway state in FIG. 2;

FIG. 4 is a partially enlarged cross-sectional view showing an unlocking operation of the movable locking pin.

FIG. 5 is a cross-sectional view showing a setting completed state in which the cutter mounting tool is locked after inserting the cutter in the cutter mounting tool and the cutter mounted state.

6A is an enlarged sectional view taken along line X1-X1 of FIG. 2, and FIG. 6B is an enlarged sectional view taken along line X2-X2 of FIG.

7A is an enlarged sectional view taken along line Y1-Y1 of FIG. 2, and FIG. 7B is an enlarged sectional view taken along line Y2-Y2 of FIG.

FIG. 8A shows another example of the present embodiment.
FIG. 6A is an enlarged sectional view corresponding to FIG. 6B, and FIG. 6B is an enlarged sectional view corresponding to FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cutting unit tool, 2 ... Cutter mounting tool, 3 ... Cutter, 4 ... Support cylinder, 5 ... Movable lock ball (movable lock part),
6: lock operation tube (lock operation body), 7: torsion spring (second elastic body), 8: lock release operation tube (lock release operation body), 9: movable locking pin (movable locking portion), 10: Compression coil spring (first elastic body), 14: Shank (insertion part), 17: Shank outer peripheral surface, 18: Shank end side outer peripheral surface (insertion / removal locus surface), 19: Shank stepped portion, 20 ... Shank middle outer peripheral surface, 26 ... flange plate (opening end), 27 ...
Support hole, 30: support hole inner peripheral surface, 31: support hole rotation center line, 32: support hole bottom inner peripheral surface, 33: stepped portion, 34: support hole opening side inner peripheral surface, 51: locking hole ( Locked part), 61 ...
Shank flat portion (inserting and removing track surface), Q ₅ ... lock state, P
₅ ... unlocked state, Q ₆ ... locked position, P ₆ ... the unlocked position, Q ₉ ... locking position, P ₉ ... unlocked position, D ₁₈
... outer diameter, D ₂₀ ... outer diameter, D ₃₂ ... inner diameter, D ₃₄ ... inner diameter.

Claims (12)

[Claims] 1. A support cylinder having a support hole into which an insertion portion of a cutter is removably fitted, a lock operation body movably supported with respect to the support cylinder at a lock position and a lock release position, and A movable lock portion supported by the support cylinder on the inner peripheral surface of the support hole of the support cylinder facing the insertion / removal trajectory surface of the outer peripheral surface of the insertion portion. A cutter mounting tool capable of taking a locked state of entering the inside of the insertion / removal locus surface of the outer peripheral surface and an unlocked state of being able to escape to the outside of the insertion / removal locus surface of the outer peripheral surface at the unlock position of the lock operation body. A movable locking portion is provided between the support cylinder and the lock operation body, the movable locking portion being locked to the support cylinder and the lock operation body. Lock operation body that blocks relative movement A locking position to hold the lock release position, the cutter fixture, characterized in that may take the unlocked position to allow movement of the locking member between the locked and unlocked positions. 2. The cutter attachment according to claim 1, further comprising an unlocking operation body for moving the movable locking portion from a locking position to a locking release position. 3. A support cylinder having a support hole into which an insertion portion of a cutter is removably fitted, a lock operation body movably supported on the support cylinder at a lock position and a lock release position, and A movable lock portion supported by the support cylinder on the inner peripheral surface of the support hole of the support cylinder facing the insertion / removal trajectory surface of the outer peripheral surface of the insertion portion. A cutter mounting tool capable of taking a locked state of entering the inside of the insertion / removal locus surface of the outer peripheral surface and an unlocked state of being able to escape to the outside of the insertion / removal locus surface of the outer peripheral surface at the unlock position of the lock operation body. The lock operating body has a cylindrical shape rotatably supported on the outer periphery of the support cylinder around a rotation center line of the support cylinder along an insertion / removal direction of an insertion portion of the cutter; Support tube into and out of which is inserted A movable locking portion is supported at the opening end of the lock operation body adjacent to the opening end of the movable cylinder, and the movable locking portion is engaged and disengaged at the opening end of the support cylinder. And a lock release operating body capable of releasing the locking of the movable locking portion to the locked portion facing the opening side end of the support cylinder. 4. The movable locking portion is locked by the locked portion at a lock release position of a lock operation body to prevent relative rotation between the support cylinder and the lock operation body to lock the lock operation body. A lock position for holding at a release position, and a lock release position for detaching from the locked portion and allowing the rotation of the lock operation body between the lock position and the lock release position. The cutter fixture according to claim 3, wherein 5. The apparatus according to claim 1, wherein the movable locking portion is movable to a locking position by an elastic force of a first elastic body.
Or the cutter attachment according to claim 2 or 4. 6. The cutter attachment according to claim 1, wherein the lock operation body can be moved to a lock position by an elastic force of a second elastic body. . 7. A cutter provided with an insertion portion which is removably inserted into a support hole of a cutter attachment, wherein an outer peripheral surface of the insert portion is fitted to an inner peripheral surface of the support hole. In addition to the intermediate outer peripheral surface, it has an end outer peripheral surface separated from the intermediate outer peripheral surface via a step, and the outer diameter of the end side outer peripheral surface is set to be smaller than the outer diameter of the intermediate outer peripheral surface. A cutter provided with a lock concave portion for engaging and disengaging a movable lock portion supported on an inner peripheral surface of the support hole, only on the end side outer peripheral surface; 8. A cutter having an insertion portion, a support cylinder having a support hole into which the insertion portion of the cutter is removably fitted, and a movable position between a lock position and an unlock position with respect to the support tube. A supporting lock operating body, and a movable lock portion supported by the support cylinder at an inner peripheral surface of a support hole of the support cylinder facing an insertion / removal locus surface of an outer peripheral surface of the insertion portion of the cutter. A lock state in which the lock operation body enters the inside of the insertion / removal locus surface of the outer peripheral surface at a lock position, and a lock release state of the lock operation body in which the lock operation body can escape to the outside of the insertion / removal locus surface of the outer peripheral surface. In a cutting unit tool provided with a cutter mounting tool that can be taken, an outer peripheral surface of an insertion portion of the cutter is an end-side outer peripheral surface inserted first into a support hole of the support cylinder, Through the step on the outer surface of the part The outer diameter of the end side outer peripheral surface is set to be smaller than the outer diameter of the intermediate outer peripheral surface. An inner peripheral surface on the bottom side where the outer peripheral surface on the end side of the fitting portion is opposed, and an inner peripheral surface on the opening side where the intermediate outer peripheral surface of the insertion portion is fitted are separated through a step portion. A cutting unit tool, wherein the inner diameter of the peripheral surface is set smaller than the inner diameter of the inner peripheral surface on the opening side, and the movable lock portion is supported by a support cylinder on the inner peripheral surface on the bottom side. 9. The outer diameter of the end-side outer peripheral surface is set to be smaller than or approximately equal to the inner diameter of the bottom-side inner peripheral surface, and the outer diameter of the intermediate outer peripheral surface is set to the opening-side inner peripheral surface. 9. The cutting unit tool according to claim 8, wherein the cutting unit tool is set substantially equal to the inner diameter of the surface. 10. The cutter attachment has a movable locking portion which is locked between the support cylinder and the lock operation body to prevent relative movement between the support cylinder and the lock operation body. The cutting unit tool according to claim 8 or 9, wherein: 11. The cutting unit according to claim 8, wherein the cutter attachment is the cutter attachment according to any one of claims 1 to 6. Utensils. 12. The apparatus according to claim 8, wherein the cutter is the cutter described in claim 7.
The cutting unit tool according to claim 1.